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MathGroup Archive 2006

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Re: Subscript assignment incompatibility??

  • To: mathgroup at
  • Subject: [mg71127] Re: [mg71101] Subscript assignment incompatibility??
  • From: Sseziwa Mukasa <mukasa at>
  • Date: Thu, 9 Nov 2006 03:37:28 -0500 (EST)
  • References: <>

On Nov 8, 2006, at 6:15 AM, kevin_jazz wrote:

> I have another very simple problem:
> x={{1,28},{2,28}}
> Subscript[p,res]  = x
> x[[1]]=x[[1]]
> {1,28}
> Subscript[p,res][[1]] = Subscript[p,res][[1]]
> \!\(Set::"setps" : \ "\!\(p\_res\) in assignment of part is not a
> symbol."\)
> So, I can't make an assignment with a variable that has a subscript??
> What am I missing?

Use the Utilities`Notation` package to make a symbol out of Subscript 
[p,res].  You can only assign to symbols, parts of symbols that  
evaluate to lists, or functions of the form head[arg] where head is  
not a protected symbol.



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